package com.example.a10928.weifriend.http.poll;

import io.reactivex.Observable;
import io.reactivex.ObservableSource;
import io.reactivex.ObservableTransformer;

/**
 * Created by Chuang on 2018/4/4.
 * 请声明此类的作用，如无声明则留null
 */
class EmptyObservableTransformer implements ObservableTransformer<Long, Long> {
    @Override
    public ObservableSource<Long> apply(Observable<Long> upstream) {
        return null;
    }
}
